Engineers have turned tissue paper -- similar to toilet tissue -- into a new kind of wearable sensor that can detect a pulse, a blink of an eye and other human movement. The sensor is light, flexible and inexpensive, with potential applications in heal...

Engineers have turned tissue paper -- similar to toilet tissue -- into a new kind of wearable sensor that can detect a pulse, a blink of an eye and other human movement. The sensor is light, flexible and inexpensive, with potential applications in health care, entertainment and robotics.